Engine speed and fuel control means



June 26, 1934. C BQOCK ENGINE SPEED AND FUEL CONTROL MEANS Filed Jan. 5. 1931 FIG.2

INVENTOR fill-R50 0. BaacK FIGJ ATTORN EY Patented June 26, 1934 UNITED STATES PATENT OFFICE Alfred C. Boock, Beloit, Wis., assignor to Fairbanks, Morse & 00., Chicago, 111., a corporation of Illinois Application January 5,

2 Claims.

This invention relates to improvements in engine speed and fuel control means, and more particularly to governing means for high speed internal combustion engines.

An object of the present invention is to provide an improved governor assembly for internal combustion engines, which is mounted on an end portion of the cam shaft of the engine, and which is removable from the cam shaft, as a unit.

A further object is to provide an improved governor assembly for internal combustion engines, which includes an improved speed control mechanism, which is carried by a removable cover portion of the engine, thereby permitting removal of the control mechanism, as a unit, from .the governor assembly, to facilitate adjustments and repairs.

An additional object is to provide an improved governor and speed control assembly for internal combustion engines which is simple in construction and economical to manufacture requiring a minimum number of parts.

Further objects and advantages will appear from the following detailed description of parts and the accompanying drawing, in which:

Fig. 1 is a side elevation of a preferred form of internal combustion engine, certain portions being broken away, and certain other portions being shown in section, and Fig. 2 is an end elevation of the engine shown in Fig. 1, certain portions being broken away, and certain other portions being shown in section.

It will, of course, be understood that the present detailed description of parts and the accompanying drawing relate to a single preferred executional embodiment of the invention, and that substantial changes may be made in the described arrangement of parts and the accompanying drawing without departing from the spirit and full intended scope of the invention.

Referring by numerals to the drawing, 10 indicates, generally, an improved form of internal combustion engine which includes a crank case portion 11 formed, by preference, in two sections, the upper section 12 being removable from and serving as an end closure for the crank case. It will be apparent that the crank case 11 is adapted to contain a quantity of oil for splash-lubrication of parts within the crank case. A crank shaft 13 is, by preference, operatively associated with a piston (not shown) by means of a connecting rod 14. An operative connection is effected between the crank shaft 13 and a cam shaft 15 by means of a driving gear 16 meshing with a driven gear 17 keyed to the cam shaft.

1931, Serial No. 506,625

The governor proper is indicated generally at 18, and includes a bracket or frame member 19 which is welded or otherwise rigidly secured to a bushing or hollow threaded member 20. The cam shaft 15 is, by preference, bored or formed hollow near one end, being provided with internal threads 21 which threadedly engage and secure the bushing and governor frame member to the cam shaft 15. The frame member 19 is provided with up-turned flange portions 22 which are directed outwardly and radially at opposite sides to form opposed fork-like bearing portions for pins 23, on which are pivoted centrifugal weight members 24. Slidably mounted within the bushing 20 is a governor spindle 25, the inner end of which engages a spring 26 housed within the hollow portion of the cam shaft. A plurality of spaced collars or annular flanges 27 are provided on the spindle 25, a pair of such flanges being formed and spaced to engage, and receive therebetween, the end portions 28 of arms 29 of the governor weights 24. By this provision the endwise movement of the governor spindle 25, under the infiuence of the centrifugal movements of the weights, is transmitted to a lever 30, one end 31 of which constitutes a crank, extending between other of the collar flanges 27. It will be apparent that the endwise movement of the governor spindle produces an oscillating movement, or incomplete rotation of the lever 30, which is carried in bearing portions 32 formed by parts of the engine frame. A lever 33 is keyed to the opposite end of the lever 30, and by means of a link 34 controls the throttling movement of a butterfly valve (not shown) associated with a carburetor 35 of the engine.

It will be apparent that the centrifugal influence of the governor in throttling the engine, is qualified by the loading of the spring 26, the preferred arrangement being such that the tendency of the spring is to open the throttle valve through its related control members. However, it will be seen that the outward movement of the spindle, and therefore the inwardly pivotal movement of the weight members is limited in part, by means of contact between the weight portions of the centrifugal members and the outer marginal edge portions of the frame 19, (see Fig. 2).

The action of the governor weights is preferably controlled and clamped to a certain extent by means of a spring 36 which engages end portions of the bearing surfaces 37 of the governor weights. The spring 36 is in the nature of a bow spring,

with its central or bowed portion bearing against the inner surface of one of the flange portions 22 on the governor bracket. By this provision the pivotal movement of the centrifugal weight members is retarded, and a slight drag on the action of the governor is provided which tends to produce better and steadier governor operation. This action may be readily adjusted by. means of a cap-screw 38 which is threaded into a central portion of the flange on the governor frame, and which increase or decreases the amount of friction between the opposite ends of the bow spring and the governor weights. This adjustment may, when once set, be locked in place, by means of a lock nut 39.

A manual speed reducer ror control 40.forxthe governor, includes a fiat piece or" spring steel 41 or the like, which bears against an end 42 of the governor spindle for a purpose hereinafter'appearing. Between limits, any desired pressure may be brought to bear on the governor spindle j-by'the'member 41, which pressure'tends toop- .pose the action of the principal .governor spring '26. The spring member 41 is rigidly secured to a pivot member 43 which is journaled in and extends through theremovable crankcase cover 12. ,A'handle 44formed of an extending flat spring piece, is secured-to the member 43, and rotation of this handle rotates-the member43 to increase or decrease the adjusting tension on the governor spindle. A spring 45 is mounted axially on the member .43, this spring coactingwith a collar 46, and tending to move the member 43 into contact with a stop lug 4'7 formed on the engine frame. .It will be readily seen that the outer end of the ,handle 44 is limited in itslrotational movement by means of lugs 48-formed onthe cover,'the lugs -being spaced *to form notches therebetween. These notches and 1ugs:form means not-onlyjfor readily indicating the speed-setting ofthe governor, but serve to retainthe handle in any desired position corresponding to the adjusting pressure desired to be placed on the governor spindle.

As .will appear fromthedrawing, the arrangement of the spring member 41 and its relation to the handle 44, is such thatthe engine is permitted 'to operate at full speed when the member 44 is positioned at theextreme left (Fig. 2), or nearest the fly wheel. It will'appear'that the crankportion of the :member 30 serves to position the throttle or throttle-control linkage, this arrangement being such that as the crank end of member 30 is permitted'to rotate counterclockwise (Fig.2) to its fullest extent, the throttle is permitted to open'to the greatest extent. As-the handle 44 is notched to the right (Fig. 2), the spring member -41is'1ikewise movedto the right (Fig. 2), so that thegovernor spindle serves ,to rotate the crank end of rod 30 clockwise and hence to establish a lesser limit of opening -movemcnt of the-throttle or throttle linkage.

.the governor may be readily made.

It will be readily seen that the present improved assembly affords a compact and simple arrangement in which all the parts are easily formed of stock materials and readily accessible for repair purposes. Advantages in accessibility are pro- 30 vided in that the cover 12 may be removed, and the speed controlassembly'removed along with the cover to afford ease in adjusting and repairing this assembly apart from the engine. With the cover removed any desired adjustments to 35 It will also be seen that the cover 12 serves as a crank case closure for the engine, and that routine manual -speed adjustments may be instantly and easily effected from the-exterior of the crank case by means of thev described control arrangement.

I claim:

ljIn'an engine governor assembly, a casing having a'removable cover, a governor operatively disposed in said casing and including a spindle movableendwise under centrifugal influence, a

governor speed regulatorcarried as'a unit by said removable cover, including a. rotatable and axially shiftable pivot member journalled on and extending through the cover and spaced laterally of the i governor assembly, a'stop lug 'carried by and within said cover, a collar on said pivot member adjacent said lug and spacedfrom said cover, a spring disposed between said collar and cover for biasing the pivot member toward'said stop .105 lug, a resilient arm extending from said pivot member and engaging one end of said spindle, a flexible arm disposed exteriorly of the casing cover, and adaptedyas a leverfor manual rotation of said pivot member, and projections'formed on 11.10 said cover, for maintaining said flexible arm in adjusted relation to the governor spindle.

2. In an engine governor assembly of enclosed type, a case including a removable case cover, a

governor of a type including aspring-pressed .115 spindle, a governor speed regulatorzcarried as a unit by said case cover, and including a resilient blade member extending transversely of and'having one end bearing against one endof the spindle, a blade pivot securedto the opposite end of said blade vmember and. extending outwardly through and carried by said case cover, a resilient, angularly movable control handle'disposed exteriorly of the case cover, and arranged for adjusting-movement of said pivot about its axis, a spring seat on said pivot, within the case and spaced from the cover, aspring carried by the pivot, one end of the spring engaging said seat, and the opposite end engaging the inner surface of the cover, and projections formed externally 3530 on said case cover and adapted to engage and maintain the free end of saidhan'dle-in adjusted .positions on the cover, andarranged visually to indicatethe adjustment settings of the governor.

ALFRED C. BOOCK. 

